Yeah, the site and service seem to be trying to attract a range of people. However, `beancount` and the other `ledger-cli` like tools are all just plain-text files with a semi-rigid markup for recording transactions.

https://plaintextaccounting.org/ is the resource for most of them, and has good resources for making them work for you. It's not for everyone, though, many people just prefer spreadsheets or apps, and that's fine.